(US4983782-A)      Liq. phase prod. of low temp. carbonisation of waste is hydrogenated in presence of 0.5-5 wt.% catalyst under a hydrogen pressure of 20-325, pref. 150-200 bar, at 250-500 (pref. 400-490) deg.C and at a gas to liquid ratio 100-3,000 Nm3/t. The liquid phase contains polycyclic aromatic hydrocarbons and/or chlorinated hydrocarbons.    The catalyst is pref. low temp. coke or brown coal coke. The carbonisation is carried out in presence of a basic additive, (pref. lime). The waste is plastic waste, hydrocarbon loaded residues, contaminated soil, a biomass or sludge.    USE/ADVANTAGE -   For treatment of specific problem waste; no polycyclic or chlorinated hydrocarbons are released to the environment without having to use expensive measures. @(5pp)    (DE3872869-G)      Liq. prods. obtd. from low temp. carbonisation (LTC) of plastic waste, hdyrocarbon contg. material, contaminated soils, biomass, waste sludges as well as LTC tar and coke are worked up by (A) subjecting the prods. to a sump/gas phase hydrogenation under an H2 press of 20-325 bar at 250-500 deg. C, a gas:oil ratio 100-3,000 m3/t (0 deg. C, atm. press) using 0.5-5 wt. % of (B) as disposable catalyst, disposable catalyst support and/or additive internally or externally obtd. LTC coke or lignite coke opt. impregnated with catalytically active metals or their salts.    The LTC prods. are pref. obtd. from a process carried out in a (in)directly heated drum or from a LTC step in which acid gases formed are bound by basic addives.    ADVANTAGE -   Harmful substances are converted into valuable, useful, harmless hydrocarbon products.    (SU1766265-A3)      Liq. prods. obtd. from low temp. carbonisation (LTC) of plastic waste, hydrocarbon contg. material, contaminated soils, biomass, waste sludges as well as LTC tar and coke are worked up by (A) subjecting the prods. to a sump/gas phase hydrogenation under an H2 press of 20-325 bar at 250-500 deg. C, a gas:oil ratio 100-3,000 m3/t (0 deg. C, atm. press) using 0.5-5 wt. % of (B) as disposable catalyst, disposable catalyst support and/or additive internally or externally obtd. LTC coke or lignite coke opt. impregnated with catalytically active metals or their salts.    The LTC prods. are pref. obtd. from a process carried out in a (in)directly heated drum or from a LTC step in which acid gases formed are bound by basic additives. additives.    ADVANTAGE -   Harmful substances are converted into valuable, useful, harmless hydrocarbon products. Bul. 36/30.9.9